How to do Upgrade

I have packaged Crystal Reports 11.0.0.1282. But I need to upgrade the Crystal Reports 7.0.0.0 while installing my new application. I have added upgrade enty in my new application. This is major upgrade so which attribute I need to give in the upgrade table. I have tried with 768, 258, 517,2,4 attribute values. But it is installing my newer version without uninstalling the older version.
Older version folder structure is SeagateSoftware\Crystal Reports\
Newer version folder sttucture is BusinessObjects\Crystal Reports 11\